universal telephone speaker

telephone speaker 1:model:RB-31440G-01R 2:dimension:31mm*4.7mm 3:spc:440ohm 0.3w~0.5w 4:low distortion,reliable,wide use

telephone speaker

1.RB-31440G-01R

2.Dimension :as show in the bottom

3.Weight: Approx  4.0  Grams

4.Magnet: Material  Nd-Fe-B   Size Φ9.5×1.5mm.

5.Impedance: 440 ± 15%  Ohm    at 1000Hz. 1V

6.Power rating: Normal 0.3w   Maximum 0.5w

7.FO:550±20% Hz

8.S.P.L.: 85±3dB/0.05Watt 0.1Meter.   Average At1000 ,1182,1504,2000Hz.

9.Frequency range: 280~16,000Hz.Average SPL-10dB

10.Distortion: 10%  Maximum  At 1000Hz. 0.05W

11.Abnormal Sound Test: Must be Normal Tested by 11.5 Volts. Sine wave for50~5kHz

12.Polarity: Diaphragm Shall Move Forward When Apply a Positive DC

13.Operating temperature: -20 °C  to +50 °C

14.Storage temperature: -25 °C  to +55 °C

universal telephone speaker